. >> we extract sewage from the city mines. we have a very large recycling plant on site. 90% of the water consumption is recycled. >> the tower also posts the tallest trees in sydney perched atop the terrace. the building faces north and takes advantage of the sun's elliptical movement with that he is blinds tilting and retracting at specific intervals during the day to take the proesh off the internal cooling an heating system. it may be a model for green innovation. australia, kran businesses in general are rapidly moving towards a greener cleaner future. >> you're seeing the development of projects, you're seeing buildings at very important time in this country. >> and it's not just government policies which is prompting change. in fact one expert on the shift to greener technology says there's a growing change in attitudes across the corporate sector. >> there are benefits here to be gained and how do we stretch that further. i think with a we'hat we'll fin businesses starting to ask themselves how do we get business benef